Name
- Roger ab Robert1
- Rowland Meredydd1
- Salisbury, William, of Add MS 149291
- Siams Davyddd1
- Siams ab Harri1
- Siancyn Morgan1
- Sion Meirion1
- Sion Morgan1
- Sion Owain, Syr1
- Sion Rogier1
- Sion Tomas Owain1
- Sion ab Meredydd ab Hywel1
- Sion ab Rhobert ab Rhys ab Hywel1
- Smart, Christopher, of Add MS 149361
- Sovereigns of England1
- Thomas Anwyl1
- Thomas Davies Baselden1
- Thomas Derllys1
- Thomas Glyn Llifon1
- Thomas Gwynedd1